U.S. patent application number 16/262594 was filed with the patent office on 2019-05-30 for combined solution pump and storage system for use with a reduced-pressure treatment system.
The applicant listed for this patent is KCI Licensing, Inc.. Invention is credited to Thomas LAWHORN, Kenneth R. SMITH, Aidan Marcus TOUT.
Application Number | 20190160271 16/262594 |
Document ID | / |
Family ID | 49780338 |
Filed Date | 2019-05-30 |
View All Diagrams
United States Patent
Application |
20190160271 |
Kind Code |
A1 |
TOUT; Aidan Marcus ; et
al. |
May 30, 2019 |
Combined Solution Pump And Storage System For Use With A
Reduced-Pressure Treatment System
Abstract
A therapy device for instillation of fluid to a tissue site is
described. The therapy device includes a base having a cartridge
receptacle and a support coupled to the base to secure the base to
a pole. The therapy device also includes a cartridge configured to
engage the base when positioned in the cartridge receptacle. The
therapy device also includes a pump head disposed within the
cartridge receptacle and configured to engage the cartridge for
movement of fluid. The cartridge includes a body forming at least a
portion of a fluid reservoir and a tube segment coupled to the body
and in fluid communication with the fluid reservoir. The tube
segment is configured to engage the pump head.
Inventors: |
TOUT; Aidan Marcus;
(Alderbury, GB) ; SMITH; Kenneth R.; (San Antonio,
TX) ; LAWHORN; Thomas; (Denham Springs, LA) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
KCI Licensing, Inc. |
San Antonio |
TX |
US |
|
|
Family ID: |
49780338 |
Appl. No.: |
16/262594 |
Filed: |
January 30, 2019 |
Related U.S. Patent Documents
|
|
|
|
|
|
Application
Number |
Filing Date |
Patent Number |
|
|
14087418 |
Nov 22, 2013 |
10232155 |
|
|
16262594 |
|
|
|
|
61729926 |
Nov 26, 2012 |
|
|
|
Current U.S.
Class: |
1/1 |
Current CPC
Class: |
A61M 3/0258 20130101;
A61M 1/0088 20130101; A61M 2205/502 20130101; A61M 2205/14
20130101; A61M 2205/332 20130101; A61M 2205/3375 20130101; A61M
1/0023 20130101; A61M 3/0266 20130101; A61M 1/0084 20130101; A61M
2205/12 20130101; A61M 3/022 20140204 |
International
Class: |
A61M 35/00 20060101
A61M035/00; A61M 1/00 20060101 A61M001/00; A61M 3/02 20060101
A61M003/02 |
Claims
1.-17. (canceled)
18. A solution cartridge for an instillation therapy device, the
solution cartridge comprising: a body forming at least a portion of
a fluid reservoir; a fill port fluidly coupled to the fluid
reservoir and configured to receive fluid; a seal coupled to the
fill port; and a tube segment coupled to the body and in fluid
communication with the fluid reservoir, the tube segment configured
to engage a pump head of a therapy device for movement of fluid
from the fluid reservoir.
19. The solution cartridge of claim 18, further comprising a load
cell segment fluidly coupled to the tube segment between the tube
segment and the fluid reservoir.
20. The solution cartridge of claim 18, further comprising an
ultra-sonic inspection segment fluidly coupled to the tube segment
between the tube segment and a tissue site.
21. The solution cartridge of claim 18, wherein the body comprises
a lid configured to form at least a portion of a fluid
reservoir.
22. The solution cartridge of claim 18, wherein the body comprises
a lid configured to form at least a portion of a fluid reservoir,
and the lid has a recess configured to receive at least a portion
of the tube segment and a pump head of the therapy device.
23. A solution cartridge for an instillation therapy device, the
solution cartridge comprising: a body forming at least a portion of
a fluid reservoir, the body having an ovoid-shape with a rounded
end and a flattened end opposite the rounded end; a fill port
fluidly coupled to the fluid reservoir and configured to receive
fluid; a cap coupled to the fill port; and a tube segment coupled
to the body and in fluid communication with the fluid reservoir,
the tube segment configured to engage a pump head of a therapy
device for movement of fluid from the fluid reservoir.
24. The solution cartridge of claim 23, wherein the body has at
least one notch proximate to the flattened end.
25. The solution cartridge of claim 23, wherein the body comprises
a raceway and the tube segment comprises a tube suspended across
the raceway.
26. The solution cartridge of claim 23, wherein the body comprises
a semicircular raceway, and the tube segment comprises a tube
suspended across the raceway.
27. The solution cartridge of claim 23, further comprising a load
cell segment fluidly coupled to the tube segment between the tube
segment and the fluid reservoir.
28. The solution cartridge of claim 23, further comprising an
ultra-sonic inspection segment fluidly coupled to the tube segment
between the tube segment and a tissue site.
29. A solution cartridge for an instillation therapy device, the
solution cartridge comprising: a carrier having a base housing and
a tube housing; a fluid container having a port configured to
engage the base housing; and a tube segment disposed in the tube
housing and coupled to the carrier, the tube segment configured to
be in fluid communication with the fluid container and to engage a
pump head of a therapy device for movement of fluid from the fluid
container.
30. The solution cartridge of claim 29, wherein the base housing
further comprises: a rectangular body having a receptacle disposed
in an upper surface; and a venting spike disposed in the
receptacle.
31. The solution cartridge of claim 30, wherein the venting spike
is fluidly coupled to the tube segment.
32. The solution cartridge of claim 30, wherein: the venting spike
is fluidly coupled to an ambient air pressure; and the receptacle
includes a fluid passage in fluid communication with the tube
segment.
33. The solution cartridge of claim 29, further comprising a load
cell segment fluidly coupled to the tube segment between the tube
segment and the fluid container.
34. The solution cartridge of claim 29, further comprising an
ultra-sonic inspection segment fluidly coupled to the tube segment
between the tube segment and a tissue site.
35.-41. (canceled)
Description
[0001] This application is a divisional of U.S. patent application
Ser. No. 14/087,418, filed Nov. 22, 2013, which claims the benefit
under 35 U.S.C. .sctn. 119(e), of the filing of U.S. Provisional
Patent Application No. 61/729,926 filed Nov. 26, 2012, entitled
"Combined Solution Pump and Storage System for use with a Negative
Pressure Treatment System," the disclosure of which is hereby
incorporated by reference in its entirety.
TECHNICAL FIELD
[0002] The present disclosure relates generally to medical
treatment systems for treating tissue sites that produce liquids,
such as exudate, and for processing body fluids. More particularly,
but not by way of limitation, the present disclosure relates to a
system for volumetric delivery of solution with a therapy
device.
BACKGROUND
[0003] Clinical studies and practice have shown that reducing
pressure in proximity to a tissue site can augment and accelerate
growth of new tissue at the tissue site. The applications of this
phenomenon are numerous, but it has proven particularly
advantageous for treating wounds. Regardless of the etiology of a
wound, whether trauma, surgery, or another cause, proper care of
the wound is important to the outcome. Treatment of wounds with
reduced pressure may be commonly referred to as "reduced-pressure
therapy," but is also known by other names, including
"negative-pressure therapy," "negative-pressure wound therapy,"
"vacuum therapy," and "vacuum-assisted closure," for example.
Reduced-pressure therapy may provide a number of benefits,
including migration of epithelial and subcutaneous tissues,
improved blood flow, and micro-deformation of tissue at a wound
site. Together, these benefits can increase development of
granulation tissue and reduce healing times.
[0004] In addition, the delivery of therapeutic fluids, such as
saline or antibiotic fluids, to the tissue site can also provide
healing benefits to the tissue site. Treatment of tissue sites with
the delivery of therapeutic fluids may be referred to as
"instillation therapy." Instillation therapy may assist in cleaning
the tissue site by aiding in the removal of infectious agents or
necrotic tissue. The therapeutic fluids used in instillation
therapy may also include medicinal fluids, such as antibiotics,
anti-fungals, antiseptics, analgesics, or other similar substances,
to aid in the treatment of a tissue site.
[0005] While the clinical benefits of reduced-pressure therapy and
instillation therapy are widely known, the cost and complexity of
reduced-pressure therapy and instillation therapy can be a limiting
factor in its application, and the development and operation of
reduced-pressure systems, components, and processes continues to
present significant challenges to manufacturers, healthcare
providers, and patients.
SUMMARY OF ILLUSTRATIVE EMBODIMENTS
[0006] According to an illustrative embodiment, a therapy device
for instillation of fluid to a tissue site is described. The
therapy device may include a base having a cartridge receptacle and
a support coupled to the base to secure the base to a pole. The
therapy device may also include a cartridge configured to engage
the base when positioned in the cartridge receptacle. The therapy
device may further include a pump head disposed within the
cartridge receptacle and configured to engage the cartridge for
movement of fluid.
[0007] According to another illustrative embodiment, a solution
cartridge for an instillation therapy device is described. The
solution cartridge may include a body forming at least a portion of
a fluid reservoir. A fill port fluidly may be coupled to the fluid
reservoir and configured to receive fluid. A heat seal may be
coupled to the fill port. The solution cartridge may include a tube
segment coupled to the body and in fluid communication with the
fluid reservoir. The tube segment may be configured to engage a
pump head of a therapy device for movement of fluid from the fluid
reservoir.
[0008] According to still another example embodiment, a solution
cartridge for an instillation therapy device is described. The
solution cartridge may include a body forming at least a portion of
a fluid reservoir. The body may have an ovoid-shape with a rounded
end and a flattened end opposite the rounded end. The body may
include a fill port fluidly coupled to the fluid reservoir and
configured to receive fluid and a cap coupled to the fill port. The
solution cartridge may also include a tube segment coupled to the
body and in fluid communication with the fluid reservoir. The tube
segment may be configured to engage a pump head of a therapy device
for movement of fluid from the fluid reservoir.
[0009] According to yet another embodiment, a solution cartridge
for an instillation therapy device is described. The solution
cartridge includes a carrier having a base housing and a tube
housing. The solution cartridge also includes a fluid container
having a port configured to engage the base housing. The solution
cartridge may further include a tube segment disposed in the tube
housing and coupled to the carrier. The tube segment may be
configured to be in fluid communication with the fluid container
and to engage a pump head of a therapy device for movement of fluid
from the fluid container.
[0010] According to still another example embodiment, a therapy
device for treating a tissue site is described. The therapy device
may include a solution cartridge having a fluid reservoir, a
raceway, and a tube suspended across the raceway. The therapy
device may also include a cartridge receptacle adapted to receive
the solution cartridge. The therapy device may further include a
rotary-delivery pump head disposed within the cartridge receptacle.
The rotary-delivery pump head may have a circumferential edge and
lobes coupled to the circumferential edge. The circumferential edge
may be adapted to press the tube into the raceway and the lobes are
adapted to cyclically engage the tube in the raceway.
[0011] Other aspects, features, and advantages of the illustrative
embodiments will become apparent with reference to the drawings and
detailed description that follow.
BRIEF DESCRIPTION OF THE DRAWINGS
[0012] FIG. 1 is a functional block diagram of an example
embodiment of a therapy system that can regulate therapeutic
pressure and/or supply instillation solution in accordance with
this specification;
[0013] FIG. 2 is a perspective view of a therapy device with a
solution cartridge installed in accordance with an illustrative
embodiment;
[0014] FIG. 3 is a side elevation of the therapy device of FIG. 2
with the solution cartridge installed;
[0015] FIG. 4 is a perspective view of a portion of the therapy
device of FIG. 2 having the solution cartridge removed;
[0016] FIG. 5 is a perspective view of the solution cartridge of
FIG. 2;
[0017] FIG. 6 is a side elevation of the solution cartridge of FIG.
5;
[0018] FIG. 7 is a side elevation of another solution cartridge
installed in a therapy device;
[0019] FIG. 8 is perspective view of the solution cartridge of FIG.
7;
[0020] FIG. 9A is a sectional view of the solution cartridge of
FIG. 8 taken along line 9A-9A of FIG. 8;
[0021] FIG. 9B is a sectional view of the solution cartridge of
FIG. 8 taken along line 9B-9B of FIG. 8;
[0022] FIG. 9C is a sectional view of another example embodiment of
the solution cartridge of FIG. 8 taken along line 9B-9B of FIG.
8;
[0023] FIG. 9D is a plan view of a port of the solution cartridge
of FIG. 8;
[0024] FIG. 10 is a side elevation of the therapy device of FIG. 7
having the solution cartridge removed;
[0025] FIG. 11 is an exploded view of another example embodiment of
a solution cartridge;
[0026] FIG. 12 and FIG. 13 are sectional views of a portion of a
port of the solution cartridge of FIG. 11 having a venting spike
disposed therein;
[0027] FIG. 14 is a plan view of a cap of the port of FIG. 12 and
FIG. 13;
[0028] FIG. 15 is a side elevation of an example embodiment of a
therapy device that may be used with the solution cartridge of FIG.
11;
[0029] FIG. 16 is an exploded view of another example embodiment of
a lid of the solution cartridge of FIG. 11;
[0030] FIG. 17 is a side elevation of another embodiment of a
solution cartridge;
[0031] FIG. 18 is a rear elevation of the solution cartridge of
FIG. 17;
[0032] FIG. 19 is a sectional view of the solution cartridge of
FIG. 18 taken along line 19-19;
[0033] FIG. 20 is a side elevation of a therapy device that may be
used with the fluid container of FIG. 17; and
[0034] FIG. 21 is a partial front elevation of the therapy device
of FIG. 20.
DETAILED DESCRIPTION OF ILLUSTRATIVE EMBODIMENTS
[0035] New and useful systems, methods, and apparatuses for
providing a combined solution pump and solution storage system for
treating a tissue site are set forth in the appended claims.
Objectives, advantages, and a preferred mode of making and using
the systems, methods, and apparatuses may be understood by
reference to the following detailed description in conjunction with
the accompanying drawings. The description provides information
that enables a person skilled in the art to make and use the
claimed subject matter, but may omit certain details already
well-known in the art. Moreover, descriptions of various
alternatives using terms such as "or" do not necessarily require
mutual exclusivity unless clearly required by the context. The
claimed subject matter may also encompass alternative embodiments,
variations, and equivalents not specifically described in detail.
The following detailed description should therefore be taken as
illustrative and not limiting.
[0036] The example embodiments may also be described herein in the
context of reduced-pressure therapy and instillation therapy
applications, but many of the features and advantages are readily
applicable to other environments and industries. Spatial
relationships between various elements or the spatial orientation
of various elements may be described as depicted in the attached
drawings. In general, such relationships or orientations assume a
frame of reference consistent with or relative to a patient in a
position to receive reduced-pressure therapy. However, as should be
recognized by those skilled in the art, this frame of reference is
merely a descriptive expedient rather than a strict
prescription.
[0037] FIG. 1 is a simplified functional block diagram illustrating
details that may be associated with some embodiments of a therapy
system 100. In some embodiments, the therapy system 100 can provide
therapeutic pressure and/or instillation in accordance with this
specification. In some embodiments, the therapy system 100 may
include a dressing 102 fluidly coupled to a therapy device 104. The
dressing 102 may include a drape, such as a drape 108, and a tissue
interface, such as a manifold 110. The therapy system 100 may also
include a fluid container, such as a container 112, and/or a
solution cartridge, such as a cartridge 114. The container 112 may
be fluidly coupled between the dressing 102 and the therapy device
104. The cartridge 114 may be fluidly coupled to the dressing 102
and operationally coupled the therapy device 104.
[0038] In general, components of the therapy system 100 may be
coupled directly or indirectly to each other. For example, the
therapy device 104 may be directly coupled to the container 112 and
indirectly coupled to the dressing 102 through the container 112.
Components may be fluidly coupled to each other to provide a path
for transferring fluids (i.e., liquid and/or gas) between the
components. In some embodiments, components may be fluidly coupled
with a tube, for example. A "tube," as used herein, broadly refers
to a tube, pipe, hose, conduit, or other structure with one or more
lumina adapted to convey fluids between two ends. Typically, a tube
is an elongated, cylindrical structure with some flexibility, but
the geometry and rigidity may vary. In some embodiments, components
may additionally or alternatively be coupled by virtue of physical
proximity, being integral to a single structure, or being formed
from the same piece of material. Coupling may also include
mechanical, thermal, electrical, or chemical union (such as a
chemical bond) in some contexts.
[0039] In operation, a tissue interface, such as the manifold 110,
may be placed within, over, on, against, or otherwise adjacent to a
tissue site. For example, the manifold 110 may be placed against a
tissue site, and the drape 108 may be placed over the manifold 110
and sealed to tissue proximate to the tissue site. Tissue proximate
to a tissue site is often undamaged epidermis peripheral to the
tissue site. Thus, the dressing 102 can provide a sealed
therapeutic environment proximate to a tissue site, substantially
isolated from the external environment, and the therapy device 104
can reduce the pressure in the sealed therapeutic environment.
Reduced pressure can be distributed through the tissue interface
across the tissue site in the sealed therapeutic environment to
induce macrostrain and microstrain, as well as to remove exudates
and other fluids from a tissue site, which can be collected in the
container 112 and disposed of properly.
[0040] Exudates may refer to fluid that filters from the
circulatory system into lesions or areas of inflammation. Exudates
may include water and dissolved solutes. Dissolved solutes may
include blood, plasma proteins, white blood cells, platelets, and
red blood cells. In some embodiments, exudates may include serum,
fibrin, and white blood cells. In other embodiments, exudates may
include pus having a thin protein-rich fluid and dead
leukocytes.
[0041] The fluid mechanics of using a reduced-pressure source to
reduce pressure in another component or location, such as within a
sealed therapeutic environment, can be mathematically complex.
However, the basic principles of fluid mechanics applicable to
reduced-pressure therapy are generally well-known to those skilled
in the art, and the process of reducing pressure may be described
illustratively herein as "delivering," "distributing," or
"generating" reduced pressure, for example.
[0042] In general, exudates and other fluids flow toward lower
pressure along a fluid path. Thus, in the context of
reduced-pressure therapy, the term "downstream" typically implies
something in a fluid path relatively closer to a reduced-pressure
source, and conversely, the term "upstream" implies something
relatively further away from a reduced-pressure source. Similarly,
it may be convenient to describe certain features in terms of fluid
"inlet" or "outlet" in such a frame of reference. This orientation
is generally presumed for purposes of describing various features
and components of reduced-pressure therapy systems herein. However,
the fluid path may also be reversed in some applications (such as
by substituting a positive-pressure source for a reduced-pressure
source) and this descriptive convention should not be construed as
a limiting convention.
[0043] The term "tissue site" in this context broadly refers to a
wound or defect located on or within tissue, including but not
limited to, bone tissue, adipose tissue, muscle tissue, neural
tissue, dermal tissue, vascular tissue, connective tissue,
cartilage, tendons, or ligaments. A wound may include chronic,
acute, traumatic, subacute, and dehisced wounds, partial-thickness
burns, ulcers (such as diabetic, pressure, or venous insufficiency
ulcers), flaps, and grafts, for example. The term "tissue site" may
also refer to areas of any tissue that are not necessarily wounded
or defective, but are instead areas in which it may be desirable to
add or promote the growth of additional tissue. For example,
reduced pressure may be used in certain tissue areas to grow
additional tissue that may be harvested and transplanted to another
tissue location.
[0044] "Reduced pressure" generally refers to a pressure less than
a local ambient pressure, such as the ambient pressure in a local
environment external to a sealed therapeutic environment provided
by the dressing 102. In many cases, the local ambient pressure may
also be the atmospheric pressure at which a patient is located.
Alternatively, the pressure may be less than a hydrostatic pressure
associated with tissue at the tissue site. Unless otherwise
indicated, values of pressure stated herein are gauge pressures.
Similarly, references to increases in reduced pressure typically
refer to a decrease in absolute pressure, while decreases in
reduced pressure typically refer to an increase in absolute
pressure.
[0045] The therapy device 104 may include a reduced-pressure
source. A reduced-pres sure source may be a reservoir of air at a
reduced pressure, or may be a manual or electrically-powered device
that can reduce the pressure in a sealed volume, such as a vacuum
pump, a suction pump, a wall suction port available at many
healthcare facilities, or a micro-pump, for example. A
reduced-pressure source may be housed within or used in conjunction
with other components, such as sensors, processing units, alarm
indicators, memory, databases, software, display devices, or user
interfaces that further facilitate reduced-pressure therapy. While
the amount and nature of reduced pressure applied to a tissue site
may vary according to therapeutic requirements, the pressure
typically ranges between -5 mm Hg (-667 Pa) and -500 mm Hg (-66.7
kPa). Common therapeutic ranges are between -75 mm Hg (-9.9 kPa)
and -300 mm Hg (-39.9 kPa).
[0046] The therapy device 104 may also include a fluid source. A
fluid source may be a reservoir of fluid at an atmospheric or
greater pressure, or may be a manual or electrically-powered
device, such as a pump, that can convey fluid to a sealed volume,
such as a sealed therapeutic environment, for example. In some
embodiments, a fluid source may be a peristaltic pump. A
peristaltic pump may include a circular pump casing having a rotor
with one or more rollers. In some embodiments, a rotor may also be
referred to as a pump head, and rollers may also be referred to as
shoes, wipers, or lobes, for example. The rollers may be attached
around a circumference of the rotor and positioned proximate to a
section of tube. A peristaltic pump may further include a motor
coupled to the rotor and configured to rotate the rotor so that the
rollers engage the section of tube. As each roller engages the tube
it may compress a portion of the tube, occluding the compressed
portion of the tube. Rotation of the rotor may move the compressed
location of the tube, pushing fluid through the tube ahead of the
roller. In addition, as the tube opens after a roller passes, fluid
may be drawn into the tube behind the roller. In this manner, fluid
may be drawn into and moved through the tube. Generally, tubes
engaged by a roller of a peristaltic pump may be formed of
silicone.
[0047] A fluid source may be housed within or used in conjunction
with other components, such as sensors, processing units, alarm
indicators, memory, databases, software, display devices, or user
interfaces that further facilitate instillation therapy. The amount
and nature of the fluid applied to a tissue site may vary according
to therapeutic requirements, which may include the size of the
sealed therapeutic environment, the type of fluid, and any
additives to the fluid. In some embodiments, the fluid may include:
hypochlorite based solutions, such as hypochlorous acid and sodium
hypochlorite; silver nitrate; sulfur based solutions, such as
sulfonamides; biguanides, such as polyhexanide; cationic solutions,
such as octenidine and benzalkonium chloride; and isotonic
solutions.
[0048] The therapy device 104 may also include a user interface. A
user interface may be a device configured to allow communication
between a controller and an environment external to the therapy
device 104. In some embodiments, an external environment may
include an operator or a computer system configured to interface
with the therapy device 104, for example. In some embodiments, a
user interface may receive a signal from a controller and present
the signal in a manner that may be understood by an external
environment. In some embodiments, a user interface may receive
signals from an external environment and, in response, send signals
to a controller.
[0049] In some embodiments, a user interface may be a graphical
user interface, a touchscreen, or one or more motion tracking
devices. A user interface may also include one or more display
screens, such as a liquid crystal display ("LCD"), lighting
devices, such as light emitting diodes ("LED") of various colors,
and audible indicators, such as a whistle, configured to emit a
sound that may be heard by an operator. A user interface may
further include one or more devices, such as knobs, buttons,
keyboards, remotes, touchscreens, ports that may be configured to
receive a discrete or continuous signal from another device, or
other similar devices; these devices may be configured to permit
the external environment to interact with the user interface. A
user interface may permit an external environment to select a
therapy to be performed with the therapy device 104. In some
embodiments, a user interface may display information for an
external environment such as a duration of the therapy, a type of
therapy, an amount of reduced pressure being supplied, an amount of
instillation solution being provided, a fluid level of a container,
or a fluid level of a cartridge, for example.
[0050] The therapy device 104 may also include one or more pressure
sensors. A pressure sensor may be a piezoresistive strain gauge, a
capacitive sensor, an electromagnetic sensor, a piezoelectric
sensor, an optical sensor, or a potentiometric sensor, for example.
In some embodiments, a pressure sensor can measure a strain caused
by an applied pressure. A pressure sensor may be calibrated by
relating a known amount of strain to a known pressure applied. The
known relationship may be used to determine an unknown applied
pressure based on a measured amount of strain. In some embodiments,
a pressure sensor may include a receptacle configured to receive an
applied pressure.
[0051] The therapy device 104 may also include one or more valves.
In some embodiments, for example, a valve may be fluidly coupled
between a fluid reservoir and the dressing 102. A valve may be a
device configured to selectively permit fluid flow through the
valve. A valve may be a ball valve, a gate valve, a butterfly
valve, or other valve type that may be operated to prevent or
permit fluid flow through the valve. Generally, a valve may include
a valve body having a flow passage, a valve member disposed in the
flow passage and operable to selectively block the flow passage,
and an actuator configured to operate the valve member. An actuator
may be configured to position the valve member in a closed
position, preventing fluid flow through the flow passage of the
valve; an open position, permitting fluid flow through the fluid
passage of the valve; or a metering position, permitting fluid flow
through the flow passage of the valve at a selected flow rate. In
some embodiments, the actuator may be a mechanical actuator
configured to be operated by an operator. In some embodiments, the
actuator may be an electromechanical actuator configured to be
operated in response to the receipt of a signal input. For example,
the actuator may include an electrical motor configured to receive
a signal from a controller. In response to the signal, the
electrical motor of the actuator may move the valve member of the
valve. In some embodiments, a valve may be configured to
selectively permit fluid communication between the therapy device
104 and the dressing 102.
[0052] The therapy device 104 may also include one or more flow
meters. A flow meter may be a device configured to measure a fluid
flow rate. A flow meter may include a mechanical flow meter, a
pressure based flow meter, an optical flow meter, an open channel
flow meter, a thermal mass flow meter, a vortex flow meter,
electromagnetic, ultrasonic and coriolis flow meters, and laser
doppler flow meters. The flow meter may determine a rate of fluid
flow through the valve and transmit a signal to a controller
corresponding to the determined flow rate.
[0053] The therapy device 104 may also include one or more
controllers communicatively coupled to components of the therapy
device 104, such as a valve, a flow meter, a sensor, a user
interface, or a pump, for example, to control operation of the
same. As used herein, communicative coupling may refer to a
coupling between components that permits the transmission of
signals between the components. In some embodiments, the signals
may be discrete or continuous signals. A discrete signal may be a
signal representing a value at a particular instance in a time
period. A plurality of discrete signals may be used to represent a
changing value over a time period. A continuous signal may be a
signal that provides a value for each instance in a time period.
The signals may also be analog signals or digital signals. An
analog signal may be a continuous signal that includes a time
varying feature that represents another time varying quantity. A
digital signal may be a signal composed of a sequence of discrete
values.
[0054] In some embodiments, the communicative coupling between a
controller and other devices may be one-way communication. In
one-way communication, signals may only be sent in one direction.
For example, a sensor may generate a signal that may be
communicated to a controller, but the controller may not be capable
of sending a signal to the sensor. In some embodiments, the
communicative coupling between a controller and another device may
be two-way communication. In two-way communication, signals may be
sent in both directions. For example, a controller and a user
interface may be communicatively coupled so that the controller may
send and receive signals from the user interface. Similarly, a user
interface may send and receive signals from a controller. In some
embodiments, signal transmission between a controller and another
device may be referred to as the controller operating the device.
For example, interaction between a controller and a valve may be
referred to as the controller: operating the valve; placing the
valve in an open position, a closed position, or a metering
position; or opening the valve, closing the valve, or metering the
valve.
[0055] A controller may be a computing device or system, such as a
programmable logic controller, or a data processing system, for
example. In some embodiments, a controller may be configured to
receive input from one or more devices, such as a user interface, a
sensor, or a flow meter, for example. In some embodiments, a
controller may receive input, such as an electrical signal, from an
alternative source, such as through an electrical port, for
example.
[0056] In some embodiments, a controller may be a data processing
system. A data processing system suitable for storing and/or
executing program code may include at least one processor coupled
directly or indirectly to memory elements through a system bus. The
memory elements can include local memory employed during actual
execution of the program code, bulk storage, and cache memories
which provide temporary storage of at least some program code in
order to reduce the number of times code is retrieved from bulk
storage during execution.
[0057] In some embodiments, a controller may be a programmable
logic controller (PLC). A PLC may be a digital computer configured
to receive one or more inputs and send one or more outputs in
response to the one or more inputs. A PLC may include a
non-volatile memory configured to store programs or operational
instructions. In some embodiments, the non-volatile memory may be
operationally coupled to a battery-back up so that the non-volatile
memory retains the programs or operational instructions if the PLC
otherwise loses power. In some embodiments, a PLC may be configured
to receive discrete signals and continuous signals and produce
discrete and continuous signals in response.
[0058] The therapy device 104 may also include a power source. A
power source may be a device that supplies electric power to an
electric load. A power source may include a battery, a direct
current (DC) power supply, an alternating current (AC) power
supply, a linear regulated power supply, or a switched-mode power
supply, for example. A power supply may supply electric power to a
controller, a sensor, a flow meter, a valve, a user interface, or a
pump, for example.
[0059] A tissue interface, such as the manifold 110, can be
generally adapted to contact a tissue site. A tissue interface may
be partially or fully in contact with a tissue site. If a tissue
site is a wound, for example, a tissue interface may partially or
completely fill the wound, or may be placed over the wound. A
tissue interface may take many forms, and may have many sizes,
shapes, or thicknesses depending on a variety of factors, such as
the type of treatment being implemented or the nature and size of a
tissue site. For example, the size and shape of a tissue interface
may be adapted to the contours of deep and irregular shaped tissue
sites.
[0060] Generally, a manifold, such as the manifold 110, for
example, is a substance or structure adapted to distribute or
remove fluids across a tissue site. A manifold may include flow
channels or pathways providing multiple openings that distribute
fluids provided to and removed from a tissue site around the
manifold. In one illustrative embodiment, the flow channels or
pathways may be interconnected to improve uniformity of
distribution of fluids provided to or removed from a tissue site.
For example, open-cell foam, porous tissue collections, and other
porous material such as gauze or felted mat generally include
structural elements arranged to form flow channels. Liquids, gels,
and other foams may also include or be cured to include flow
channels.
[0061] In one illustrative embodiment, the manifold 110 may be a
porous foam pad having interconnected cells adapted to distribute
reduced pressure across a tissue site. The foam may be either
hydrophobic or hydrophilic. In one non-limiting example, the
manifold 110 can be an open-cell, reticulated polyurethane foam,
such as GranuFoam.RTM. dressing available from Kinetic Concepts,
Inc. of San Antonio, Tex.
[0062] In an example in which the manifold 110 may be made from a
hydrophilic material, the manifold 110 may also wick fluid away
from a tissue site, while continuing to distribute reduced pressure
across the tissue site. The wicking properties of the manifold 110
may draw fluid away from a tissue site by capillary flow or other
wicking mechanisms. An example of a hydrophilic foam is a polyvinyl
alcohol, open-cell foam such as V.A.C. WhiteFoam.RTM. dressing
available from Kinetic Concepts, Inc. of San Antonio, Tex. Other
hydrophilic foams may include those made from polyether. Other
foams that may exhibit hydrophilic characteristics include
hydrophobic foams that have been treated or coated to provide
hydrophilicity.
[0063] A tissue interface may further promote granulation at a
tissue site when pressure within the sealed therapeutic environment
is reduced. For example, any or all of the surfaces of the manifold
110 may have an uneven, coarse, or jagged profile that can induce
microstrains and stresses at a tissue site if reduced pressure is
applied through the manifold 110.
[0064] In one embodiment, a tissue interface may be constructed
from bioresorbable materials. Suitable bioresorbable materials may
include, without limitation, a polymeric blend of polylactic acid
(PLA) and polyglycolic acid (PGA). The polymeric blend may also
include, without limitation, polycarbonates, polyfumarates, and
capralactones. The tissue interface may further serve as a scaffold
for new cell-growth, or a scaffold material may be used in
conjunction with a tissue interface to promote cell-growth. A
scaffold is generally a biodegradable or biocompatible substance or
structure used to enhance or promote the growth of cells or
formation of tissue, such as a three-dimensional porous structure
that provides a template for cell growth. Illustrative examples of
scaffold materials include calcium phosphate, collagen, PLA/PGA,
coral hydroxy apatites, carbonates, or processed allograft
materials.
[0065] The drape 108 is an example of a sealing member. A sealing
member may be constructed from a material that can provide a fluid
seal between two components or two environments, such as between a
therapeutic environment and a local external environment. A sealing
member may be, for example, an impermeable or semi-permeable,
elastomeric film that can provide a seal adequate to maintain a
reduced pressure at a tissue site for a given reduced-pressure
source. For semi-permeable materials, the permeability of gas
generally should be low enough that a desired reduced pressure may
be maintained. An attachment device may be used to attach a sealing
member to an attachment surface, such as undamaged epidermis, a
gasket, or another sealing member. An attachment device may take
many forms. For example, an attachment device may be a
medically-acceptable, pressure-sensitive adhesive that extends
about a periphery, a portion, or an entire sealing member. Other
example embodiments of an attachment device may include a
double-sided tape, paste, hydrocolloid, hydrogel, silicone gel,
organogel, or an acrylic adhesive.
[0066] A "container," such as the container 112 broadly includes a
canister, pouch, bottle, vial, or other fluid collection apparatus.
The container 112 for example, can be used to manage exudates and
other fluids withdrawn from a tissue site. In some embodiments, the
container 112 may include substances to manage fluid in the
container 112, such as isolyzers or absorbents, for example. In
many environments, a rigid container may be preferred or required
for collecting, storing, and disposing of fluids. In other
environments, fluids may be properly disposed of without rigid
container storage, and a re-usable container could reduce waste and
costs associated with reduced-pressure therapy.
[0067] A "cartridge," such as the cartridge 114, is representative
of another container, canister, pouch, or other storage component,
which can be used to manage fluids, such as instillation solution,
that can be supplied to the tissue site. In many environments a
rigid container may be preferred or required for delivering,
storing, and supplying of the instillation solution. In other
environments, instillation solution may be provided in a non-rigid
container. A re-usable container could reduce waste and costs
associated with instillation.
[0068] In general, reduced-pressure therapy can be beneficial for
wounds of all severity, but the cost and complexity of
reduced-pressure therapy systems often limit the application of
reduced-pressure therapy to large, highly-exudating wounds present
on patients undergoing acute or chronic care, as well as other
severe wounds that are not readily susceptible to healing without
application of reduced pressure. Instillation of a fluid to a wound
may further aid in healing of a wound. Instillation may include the
slow introduction of a solution to the wound, for example. The
solution may be used to provide moisture to the wound, to provide
warmth or cold to the wound, to provide a drug to the wound, or to
provide another substance to the wound. Often, each type of
instillation therapy may require a different type of instillation
fluid to achieve a desired effect. For example, a first type of
fluid may provide moisture to the wound. A different type of fluid
may supply a drug to the wound. Many times, the need for different
fluid types to treat the wound may make instillation therapy time
consuming to administer.
[0069] Some patients may experience improved outcomes with a
combined treatment that includes using both reduced-pressure
therapy and instillation therapy. Existing therapy systems that
provide instillation or irrigation of a tissue site as well as
reduced-pressure therapy can be complicated to use and setup.
Multiple tubes, clamps, and interfaces may often be needed to
properly apply both reduced pressure and fluid to the tissue site.
For example, to set up a therapy system having both
reduced-pressure therapy and instillation therapy, components for
both systems may be placed proximate to a patient. The
reduced-pressure therapy portion may need at least one tube set
extending from the tissue site to the therapy system. In addition,
floor space near the patient may be taken up by a separate
collection container that may also require a separate tube set
extending between the tissue site and/or the therapy device.
[0070] The instillation therapy system may need at least one
intravenous pole to be placed near the patient. Another intravenous
pole may be needed to support additional therapy devices. At least
one, and often multiple, intravenous bags may be hung from the
intravenous pole. Each bag hung from the intravenous pole may
contain a different type of instillation fluid to apply a
particular type of instillation fluid to the tissue site to achieve
a desired effect. Each bag may need a separate tube set leading
from the bag to the therapy device and from the therapy device to
the tissue site. Each bag may also need clamps and valves for each
tube set. As multiple bags, tube sets, clamps, and valves are added
to the therapy system, the complexity increases. The increased
complexity increases set up time for a caregiver and increases the
likelihood that the caregiver administering therapy may incorrectly
administer therapy.
[0071] As disclosed herein, the therapy system 100 can overcome
these shortcomings and others by providing a combined solution pump
and solution storage system. In addition, the therapy device 104
may place all components pertinent to the volumetric delivery of
fluid into a single disposable assembly. The disposable assembly
may interface with the therapy device 104 automatically if the
disposable assembly engages the therapy device 104.
[0072] FIG. 2 is a perspective view of the therapy device 104
illustrating details that may be associated with some embodiments.
The therapy device 104 may have a base member, such as a body 116,
a user interface panel, such as a panel 118, and a pole support,
such as a support 120. The body 116 may be a housing, container, or
other member configured to enclose components of the therapy device
104. In some embodiments, the body 116 may have an interior space
into which pumps, tube, valves, electronics, controllers,
regulators, metering devices, or sensors, for example, may be
contained. The devices may be similar to and operate as described
above to provide reduced-pressure therapy and/or instillation
therapy. The body 116 may also include a handle 115. The handle 115
may be a portion of the body 116 configured to permit a caregiver
to grip and carry the therapy device 104.
[0073] In some embodiments, the therapy device 104 may include the
cartridge 114 and the container 112. Both the container 112 and the
cartridge 114 may insert into the therapy device 104. In some
embodiments, the container 112 and the cartridge 114 may be placed
into a front portion of the therapy device 104. As shown in FIG. 2,
the therapy device 104 may include a tube 107 and a coupling 123.
The tube 107 may protrude from a front of the therapy device 104
proximate to the cartridge 114. The coupling 123 may be fluidly
coupled to the tube 107.
[0074] FIG. 3 is a side view of the therapy device 104 illustrating
additional details that may be associated with some embodiments.
The support 120 may be a device configured for mounting of the
therapy device 104 to a support, intravenous pole, or other device.
In some embodiments, the support 120 may be configured to mount to
an intravenous pole, such as a pole 119, for example. The support
120 may include a clamping device 121. In some embodiments, the
clamping device 121 may be a threaded bolt having a handle. The
bolt may be screwed into the support 120 so that an end of the
threaded bolt of the clamping device 121 may be pressed against the
pole 119. The clamping device 121 may compress the pole 119 against
the support 120, preventing the support 120, and the therapy device
104, from moving relative to the pole 119. In other embodiments,
the support 120 may include other devices to secure the therapy
device 104 to the pole 119, such as latching mechanisms, tying
mechanisms, or fusing mechanisms, for example.
[0075] FIG. 4 is a perspective view of the therapy device 104
illustrating additional details that may be associated with some
embodiments. As shown, the cartridge 114 has been removed from the
therapy device 104. In some embodiments, the therapy device 104 may
include a cartridge receptacle 122. The cartridge receptacle 122
may be a cavity or other recessed portion of the therapy device
104. The cartridge receptacle 122 may extend into the body 116 from
a front of the body 116. In some embodiments, the cartridge
receptacle 122 may have at least a bottom surface 127, a rear
surface 131, and a side surface 133. In some embodiments, the
bottom surface 127, the rear surface 131, and the side surface 133
are perpendicular to each other. In some embodiments, the cartridge
receptacle 122 may be configured to receive the cartridge 114. For
example, the cartridge receptacle 122 may have a size and shape so
that the cartridge 114 may at least partially fit within the
cartridge receptacle 122. In some embodiments, the cartridge 114
and the cartridge receptacle 122 may be sized so that if the
cartridge 114 is inserted into the cartridge receptacle 122, an
exterior surface of the cartridge 114 may be flush with an exterior
of the therapy device 104 as shown in FIG. 2 and FIG. 3.
[0076] Referring to FIG. 4, in some embodiments, a key 124 may be
positioned within the cartridge receptacle 122 on the side surface
133. In some embodiments, the key 124 may be disposed near a center
of a height of the side surface 133. The key 124 may have a length
equal to the length of the side surface 133 so that the key 124
extends from the front of the therapy device 104 to the rear
surface 131. In some embodiments, the key 124 may protrude from the
side surface 133 of the cartridge receptacle 122. In some
embodiments, the key 124 may also include an opening 126. The
opening 126 may be configured to receive a mating component of the
cartridge 114, such as a latch, for example. In other embodiments,
the mating component may be a tube component, a venting component,
a sensing component, or a pump component, for example.
[0077] In some embodiments, a pump head 128 may be positioned
within the cartridge receptacle 122. The pump head 128 may be
positioned on the side surface 133 between the bottom surface 127
and the key 124. In some embodiments, the pump head 128 may be
rotary-delivery pump head having a rotor with one or more rollers
129. As described above, the rollers 129 may be configured to
engage a tube segment to move fluid through the tube segment using
peristalsis. The pump head 128 may be coupled to operating
components disposed within the body 116 of the therapy device 104.
In some embodiments, the operating components may include motors,
linking devices, or power sources, for example. The pump head 128
and the associated operating components may be disposed within the
body 116 of the therapy device 104 and may be operatively or
communicatively coupled to the panel 118. In some embodiments, the
panel 118 may be manipulated by a caregiver to activate the pump
head 128, causing the pump head 128 to rotate in a plane parallel
to the side surface 133. As described above, rotation of the pump
head 128 may move instillation solution from the cartridge 114 to
the tissue site.
[0078] FIG. 5 is a perspective view of the cartridge 114
illustrating additional details that may be associated with some
embodiments. FIG. 6 is a side elevation of the cartridge 114 in
FIG. 5. The cartridge 114 may include a keyway 113. The keyway 113
may be a recessed portion of the cartridge 114. In some
embodiments, the keyway 113 may be a slot or channel having a shape
configured to receive the key 124 of the cartridge receptacle 122.
In some embodiments, the keyway 113 may have a pentagonal shape to
match the key 124. The keyway 113 may extend from a front 109 of
the cartridge 114 to a back 111 of the cartridge 114.
[0079] The cartridge 114 may also include a tube housing 117. The
tube housing 117 may be a recessed portion of the cartridge 114
extending from the back 111 of the cartridge 114 toward the front
109 of the cartridge 111. The tube housing 117 may be a generally
rectangularly-shaped recess having a rounded end proximate to the
front 109 of the cartridge 114. The rounded end of the tube housing
117 may be shaped to accommodate the tube 107. The tube 107 may
have an end 105 fluidly coupled to an interior of the cartridge
114. The tube 107 may also have an elbow 103. In some embodiments,
the elbow 103 may be a U-shaped elbow. In some embodiments, the
tube housing 117 may be sized to receive the pump head 128. If the
cartridge 114 is inserted into the cartridge receptacle 122, the
pump head 128 may engage the tube 107 and be operable to compress
the tube 107 against the tube housing 117 for peristaltic movement
of fluid through the tube 107.
[0080] In some embodiments, the cartridge 114 may also include a
tube channel 134. The tube channel 134 may be another recessed
portion of the cartridge 114 that may be positioned between the
tube housing 117 and a bottom of the cartridge 114. In some
embodiments, the tube channel 134 may extend from the front 109 of
the cartridge 114 to the back 111 of the cartridge 114. The tube
channel 134 may be configured to accommodate at least a portion of
a tube, such as the tube 107. In some embodiments, the elbow 103
may turn the tube 107 so that the tube 107 can be routed from the
tube housing 117 to the tube channel 134 and protrude from the
front 109 of the cartridge 114. In some embodiments, the tube 107
may be fluidly coupled to a union, such as the coupling 123, for
example. The coupling 123 may be a device configured to fluidly
couple the tube 107 to the tissue site. For example, the coupling
123 may be configured to be fluidly coupled to a tube that is
fluidly coupled to the tissue site.
[0081] In operation, the cartridge 114 may be inserted into the
therapy device 104. If the cartridge 114 is inserted into the
cartridge receptacle 122, the key 124 and the keyway 113 may be
aligned so that the key 124 may insert into the keyway 113.
Alignment of the key 124 and the keyway 113 may align the tube
housing 117 and the pump head 128. The pump head 128 may engage the
tube 107 if the cartridge 114 is fully seated in the cartridge
receptacle 122 of the therapy device 104. Operation of the pump
head 128 may move fluid through the tube 107 from an interior of
the cartridge 114 through the coupling 123.
[0082] FIG. 7 is an elevation view of a cartridge 214 illustrating
details that may be associated with some embodiments. The cartridge
214 may be configured to engage a therapy device, for example a
therapy device 204. In some embodiments, the therapy device 204 may
be similar to and include the components of the therapy device 104.
The therapy device 204 may be configured to receive the cartridge
214. For example, the therapy device 204 may include a ledge 232
configured to support the cartridge 214 and one or more retainers
234 configured to limit lateral motion of the cartridge 214. In
some embodiments, the cartridge 214 may include a fluid container
215 and a carrier 216. Generally, the fluid container 215 may
interface with the carrier 216. The carrier 216 may interface with
the therapy device 204 to secure the fluid container 215 to the
therapy device 204 to provide instillation therapy. In some
embodiments, the carrier 216 may be an integral component of the
therapy device 204. In other embodiments, the carrier 216 may be an
independent component of the therapy device 204.
[0083] FIG. 8 is a perspective view of the cartridge 214
illustrating additional details that may be associated with some
embodiments. In some embodiments, the fluid container 215 may be a
container configured to receive and store a fluid, such as an
instillation fluid. In some embodiments, the fluid container 215
may be a refillable bottle or other device. In some embodiments,
the fluid container 215 may be a pre-manufactured fluid container
configured to engage the carrier 216. The fluid container 215 may
have an open end and a closed end (not shown) opposite the open
end. The open end of the fluid container 215 may be configured to
receive a cap, coupling, or other similar device. In some
embodiments, the fluid container 215 may have a port 218 coupled to
the open end of the fluid container 215. The port 218 may be a
device coupled to the open end of the fluid container 215 and
configured to be selectively opened. In some embodiments, the port
218 may include a seal, such as a seal 217. The seal 217 may be a
device configured to seal the fluid container 215 to another device
or component. The seal 217 may be formed of a material, such as a
rubber or other material configured to prevent fluid flow across
the seal 217. In some embodiments, the seal 217 may be an O-ring.
In some embodiments, the seal 217 may be separated from an end of
the port 218. In other embodiments, the seal 217 may be proximate
to an end of the port 218.
[0084] The carrier 216 may include a base housing 220 and a tube
housing 226. The base housing 220 may be a rectangular body having
a receptacle 222 and a venting spike 224 disposed in the receptacle
222. The receptacle 222 may be a recess disposed in a center of the
base housing 220 that extends from a top of the base housing 220
toward a bottom of the base housing 220. In the illustrated
embodiment, the receptacle 222 is cylindrical. In other
embodiments, the receptacle 222 may have other sizes and shapes.
Generally, the receptacle 222 may have a size, shape, and depth
configured to mate with the port 218 so that the port 218 fits
within the receptacle 222. The seal 217 may be configured to seal
to the receptacle 222 if the port 218 is disposed in the receptacle
222. In other embodiments, the receptacle 222 may have a size,
shape, and depth such that non-specific ports of other fluid
containers may be inserted into the receptacle 222 to engage with
the base housing 220 of the carrier 216.
[0085] In some embodiments, the tube housing 226 may couple to the
base housing 220. The tube housing 226 may be a C-channel shaped
piece coupled to a side of the base housing 220. In some
embodiments, the tube housing 226 may form a wall perpendicular to
the base housing 220 that extends upward beyond the surface of the
base housing 220 in which the receptacle 222 is formed. An inner
portion of the tube housing 226 may face away from the base housing
220. An upper end of the tube housing 226 may form an archway 211
between two sidewalls 213 of the channel-shaped piece. The inner
portion may be disposed between the archway 211 and the two
sidewalls 213 of the channel-shaped piece. In some embodiments, the
tube housing 226 may have an open end opposite the archway 211.
[0086] The inner portion of the tube housing 226 may be configured
to receive a tube 228. The tube 228 may have a first end and a
second end opposite the first end. The ends of the tube 228 may be
proximate to the open end of the tube housing 226. In some
embodiments, the tube 228 may conform to the archway 211 of the
tube housing 226. In some embodiments, the tube 228 may be in
contact with the two sidewalls 213 and the archway 211 of the tube
housing 226 along a length of the tube 228. The tube 228 may be
coupled to the base housing 220 via elbow couplings 230. The elbow
couplings 230 may be in fluid communication with the receptacle 222
or venting spike 224 and the tissue site.
[0087] FIG. 9A is a sectional view of the carrier 216 illustrating
additional details that may be associated with some embodiments. As
shown, an elbow 227 may be fluidly coupled to the elbow coupling
230 and the tube 228. The elbow 227 may provide a fluid coupling
for another tube (not shown) that may be fluidly coupled to the
tissue site. Fluid flowing from the fluid container 215 into the
tube 228 in response to operation of the therapy device 204 may
flow through the elbow coupling 230, the elbow 227, and to the
tissue site.
[0088] FIG. 9B is another sectional view of the carrier 216
illustrating additional details that may be associated with some
embodiments. FIG. 9B may be a reverse sectional view of the carrier
216 of FIG. 9A. The base housing 220 may include a coupling cavity
229 extending into the base housing 220 from a surface opposite the
receptacle 222. In some embodiments, the coupling cavity 229 may
have a major dimension, such as a diameter, that is greater than a
major dimension of the receptacle 222. In some embodiments, the
receptacle 222 and the coupling cavity 229 may be coaxial.
[0089] In some embodiments, the venting spike 224 may be disposed
within the receptacle 222. The venting spike 224 may extend
outwardly from an inner surface of the receptacle 222. In some
embodiments, the venting spike 224 may have a wider portion where
the venting spike 224 joins a surface of the receptacle 222 and
tapers to a narrower portion at a distal end of the venting spike
224. The venting spike 224 may be configured to penetrate the port
218 if the port 218 of the fluid container 215 is inserted into the
receptacle 222. For example, if the fluid container 215 is inverted
and fitted into the receptacle 222 of the base housing 220, and the
base housing 220 is secured to the therapy device 204, the venting
spike 224 may breach the port 218. In some embodiments, the venting
spike 224 may have a conduit 223. The conduit 223 may be in fluid
communication with the coupling cavity 229. In some embodiments,
the receptacle 222 may have a fluid passage 231 in fluid
communication with an elbow 233. The elbow 233 may be fluidly
coupled to the coupling 230 so that the elbow 233 is in fluid
communication with the tube 228. In operation, the port 218 may be
fitted into the receptacle 222 so that the venting spike 224
breaches into the port 218, and the conduit 223 may permit the flow
of ambient air pressure into the fluid container 215. The venting
spike 224 may form fluid paths in the port 218 adjacent to the
venting spike 224. Fluid may flow from the fluid container 215
through the port 218 into the receptacle 222 around the venting
spike 224. The fluid may flow through the fluid passage 231 into
the elbow 233 and the tube 228 in response to operation of the
therapy device 204. Ambient air pressure may flow through the
conduit 223 into the fluid container 215 to prevent formation of a
vacuum in the fluid container 215 during operation of the therapy
device 204.
[0090] FIG. 9C is a sectional view of the carrier 216 illustrating
additional details that may be associated with other embodiments.
In other embodiments, the conduit 223 of the venting spike 224 may
be fluidly coupled to an elbow 225. The elbow 225 may be fluidly
coupled to the elbow coupling 230 so that the elbow 225 may be in
fluid communication with the tube 228. Operation of the therapy
device 204 may move fluid from the fluid container 215 through the
conduit 223 of the venting spike 224, through the elbow 225 and the
elbow coupling 230 and into the tube 228. In still other
embodiments, the venting spike 224 may include multiple lumens to
allow for both venting of the fluid container 215 and flow of the
solution in the fluid container 215 into the therapy device
204.
[0091] FIG. 9D is a plan view of the port 218 illustrating
additional details that may be associated with some embodiments.
The port 218 may include a channel 219. The channel 219 may be an
area of the port 218 configured to be breached by the venting spike
224. In some embodiments, the channel 219 may include tear lines
221. The tear lines 221 may be portions of the port 218 configured
to open for flow of fluid if the venting spike 224 punctures the
channel 219. In some embodiments, the tear lines 221 may be
perforations in the port 218.
[0092] FIG. 10 is a side elevation view of the therapy device 204
illustrating additional details that may be associated with some
embodiments. As shown, the cartridge 214 has been removed from the
therapy device 204. In some embodiments, the therapy device 204 may
include a cartridge receptacle and a pump head. The cartridge
receptacle may be formed by a ledge 232 and retainers 234. The
ledge 232 may be a portion of the therapy device 204 extending away
from the therapy device 204. The ledge 232 may provide a location
onto which at least a portion of the cartridge 214 may be rested
while the cartridge 214 is engaged with the therapy device 204. The
retainers 234 may be elongated portions of the therapy device 204
that protrude from opposite sides of the therapy device 204. The
retainers 234 may limit lateral motion of the cartridge 214 if the
cartridge 214 is engaged with the therapy device 204. The pump head
236 may be a rotary-delivery pump head similar to the pump head 128
described above. The pump head 236 may include rollers or lobes 238
that may be configured to engage the tube 228 if the cartridge 214
is engaged with the therapy device 204. The pump head 236 may be
positioned relative to the ledge 232 so that if the cartridge 214
is engaged with the therapy device 204, the pump head 236 and the
lobes 238 engage the tube 228. In operation, the pump head 236 may
be rotated, causing fluid to flow from the venting spike 224 or the
receptacle 222 through the tube 228 and to the tissue site.
[0093] FIG. 11 is an exploded view of a cartridge 314 illustrating
details that may be associated with some embodiments. The cartridge
314 may include a body 316 and a lid 318. The body 316 may be a
rigid member having a rectangular shape as shown. In other
embodiments, the body 316 may not be rigid and may have other
shapes, such as triangular, circular, or amorphous shapes. In some
embodiments, the body 316 may have a back 317 and walls 319. The
body 316 may have a fluid reservoir 320 formed by the back 317 and
the walls 319. The lid 318 may enclose the fluid reservoir 320. In
some embodiments, the fluid reservoir 320 may be configured to
receive and store instillation solution or other fluid for use with
a therapy device, such as the therapy device 104 or the therapy
device 204.
[0094] The body 316 may include a port 322 in one of the walls 319
of the body 316. In some embodiments, the port 322 may be a tubular
body that mounts to one of the walls 319. The port 322 may have a
central channel 323 that extends through the wall 319 so that the
channel 323 is in fluid communication with the fluid reservoir 320.
A cap mount 324 may be coupled to the port 322. In some
embodiments, the cap mount 324 may be a rim coupled to the port 322
to provide a mounting surface for a cap 326. The cap 326 may be
coupled to the cap mount 324 to prevent fluid communication through
the port 322. The cap 326 may be coupled to the cap mount 324
following the filling of the fluid reservoir 320. In some
embodiments, the cap 326 may be threaded, secured with adhesive, or
otherwise latched to the cap mount 324. In some embodiments, the
cap 326 may be a heat seal. A heat seal may be a cap welded to the
cap mount 324 following filling of the fluid reservoir 320. The
port 322, the cap mount 324, and the cap 326 may allow a
manufacturer or pharmacist to fill the fluid reservoir 320 and then
seal the fluid reservoir 320 for transport.
[0095] The lid 318 may be configured to mount and seal to the body
316 to form the fluid reservoir 320. The lid 318 may include a port
328. The port 328 may be a tubular body extending into the fluid
reservoir 320 if the lid 318 is mounted to the body 316. The port
328 may include a channel 329 in fluid communication with the fluid
reservoir 320. In some embodiments, a vent cap 330 may be coupled
to the port 328. In some embodiments, a therapy device, such as the
therapy device 104 or the therapy device 204, may include a venting
spike 332. The vent cap 330 may block fluid flow through the port
328 until the cartridge 314 is engaged with a therapy device.
[0096] The lid 318 may also include a latch 336. The latch 336 may
be disposed on the lid 318 so that the latch 336 is on an opposite
side of the lid 318 from the fluid reservoir 320. The latch 336 may
be configured to mate with a corresponding component on a therapy
device, such as the key 124 of the therapy device 104, for example.
If the latch 336 mates with the corresponding component of a
therapy device, the latch 336 secures the cartridge 314 to the
therapy device. In this manner, the cartridge 314 may be securely
positioned on a therapy device while the therapy device instills an
instillation solution or fluid from the fluid reservoir 320 to a
tissue site.
[0097] In some embodiments, a tube assembly 338 may be coupled to
the lid 318. The tube assembly 338 may include a first mount 340, a
second mount 342, and a tube 344. The first mount 340 may be
coupled to the lid 318 and include one or more channels providing a
fluid path through the lid 318. If the lid 318 is mounted to the
body 316, the channels may be in fluid communication with the fluid
reservoir 320. A first barb 348 may be coupled to the first mount
340. The first barb 348 may be a tubular body having a channel in
fluid communication with the channels of the first mount 340. The
tube 344 may be a flexible tube having at least one lumen. The
first barb 348 may be configured to be inserted into a first end of
the tube 344 so that the tube 344 may be fluidly coupled to the
first mount 340. A retaining collar 346 may be mounted on the tube
344. The retaining collar 346 may be placed over the portion of the
tube 344 into which the first barb 348 was inserted. If the first
barb 348 is inserted into the first end of the tube 344, the first
end of the tube 344 may be expanded to accommodate the first barb
348. Thus, if the retaining collar 346 is placed over the portion
of the tube 344 into which the first barb 348 was inserted, the
retaining collar 346 may exert a frictional force on the tube 344
clamping the tube 344 to the first barb 348.
[0098] In some embodiments, the second mount 342 may be coupled to
the lid 318 and include one or more channels providing a fluid path
through the lid 318. If the lid 318 is mounted to the body 316, the
channels may be in fluid communication with the fluid reservoir
320. A second barb 350 may be coupled to the second mount 342. The
second barb 350 may be a tubular body having a channel in fluid
communication with the channels of the second mount 342. The second
barb 350 may be configured to be inserted into a second end of the
tube 344 so that the tube 344 may be fluidly coupled to the second
mount 342. A retaining collar 347 may be mounted on the tube 344.
The retaining collar 347 may be placed over the portion of the tube
344 into which the second barb 350 was inserted. If the second barb
350 is inserted into the second end of the tube 344, the second end
of the tube 344 may be expanded to accommodate the second barb 350.
Thus, if the retaining collar 347 is placed over the portion of the
tube 344 into which the second barb 350 was inserted, the retaining
collar 347 may exert a frictional force on the tube 344 clamping
the tube 344 to the second barb 350.
[0099] The tube 344 may arc between the first mount 340 and the
second mount 342 so that a pump head, such as the pump head 128 of
the therapy device 104, may be disposed under the tube 344 to
engage the tube 344. If actuated by a therapy device, the pump head
128 may engage in peristalsis as described above to move fluid from
the fluid reservoir 320 through the first mount 340, the tube 344,
and the second mount 342 for fluid communication with a tissue
site.
[0100] The second mount 342 may also include a valve connector 352.
The valve connector 352 may be in fluid communication with the
second mount 342 and the tube 344 through the second barb 350. The
valve connector 352 may be configured to receive a tube that is in
fluid communication with the tissue site. In some embodiments, the
valve connector 352 may include a valve member that is positionable
to selectively block fluid flow through the valve connector 352. In
some embodiments, the valve connector 352 may be a check valve
configured to permit fluid flow out of the second mount 342 and
block fluid flow through the valve connector 352 into the second
mount 342.
[0101] The second mount 342 may also include a pressure diaphragm
354 coupled to an outward facing portion of the second mount 342.
The pressure diaphragm 354 may be a device configured to engage a
corresponding sensor on a therapy device. The pressure diaphragm
354 may communicate a pressure in the second mount 342 to a therapy
device. In some embodiments, a therapy device may receive a
pressure signal from the pressure diaphragm 354 and, in response,
adjust therapy.
[0102] FIG. 12 is a sectional view of the venting spike 332 and the
port 328 illustrating additional details that may be associated
with some embodiments. The venting spike 332 may have a conical
portion 333 and a base portion 335. The conical portion 333 may
have a central channel 337 extending through the conical portion
333. The conical portion 333 may be coupled to the base portion
335. The conical portion 333 may have a wider portion adjacent to
the base portion 335. The conical portion 333 may taper from the
base portion 335 to a distal end. The conical portion 333 may be
configured to penetrate the vent cap 330 if the vent cap 330 of the
lid 318 is placed proximate to the venting spike 332, for example,
if the cartridge 314 is engaged with a therapy device.
[0103] The base portion 335 may be a generally tubular body having
a central channel having a filter 334 disposed within the channel.
The filter 334 and the central channel 337 may be in fluid
communication so that fluid may flow through the venting spike 332.
The base portion 335 may include a first flange 339 and a second
flange 341. The first flange 339 may be conical and extend away
from the venting spike 332. The first flange 339 may be coupled to
the venting spike 332 adjacent to a base of the conical portion
333. The second flange 341 may be coupled to a center of the base
portion 335. The second flange 341 may have a conical surface
proximate to the first flange 339 and a planar surface opposite the
first flange 339.
[0104] In some embodiments, the port 328 may include one or more
detents. For example, the port 328 may include a first detent 343,
and a second detent 345. The first detent 343 may be an annular
member disposed on an interior surface of the port 328 proximate to
the vent cap 330. The second detent 345 may also be an annular
member disposed on the interior surface of the port 328 between the
first detent 343 and an end of the port 328 opposite the vent cap
330.
[0105] FIG. 13 is a sectional view of the port 328 and the venting
spike 332 illustrating additional details that may be associated
with some embodiments. As shown in FIG. 13, the first flange 339
and the second flange 341 may be configured to engage with the
first detent 343 and the second detent 345 if the venting spike 332
is inserted into the port 328. In some embodiments, the conical
portion 333 may pierce the vent cap 330, allowing fluid
communication across the vent cap 330 through the venting spike
332. In some embodiments, the venting spike 332 may serve as a
pathway for flow of ambient air pressure into the fluid reservoir
320 to prevent formation of a vacuum in the fluid reservoir 320
during operation of the therapy device.
[0106] FIG. 14 is a plan view of the vent cap 330 illustrating
additional details that may be associated with some embodiments.
The vent cap 330 may include a channel 331. In some embodiments,
the channel 331 may form a cross extending parallel to respective
diameters of the vent cap 330. The channel 331 may be aligned with
the venting spike 332 if the venting spike 332 is disposed within
the port 328. The channel 331 may be a portion of the vent cap 330
that is more susceptible to penetration than remaining portions of
the vent cap 330. In some embodiments, the channel 331 may be a
portion of the vent cap 330 having a thickness that is less than a
thickness of the remainder of the vent cap 330. In other
embodiments, the channel 331 may be a portion of the vent cap 330
that has been treated to make the channel 331 more susceptible to
penetration compared to the remaining portions of the vent cap
330.
[0107] FIG. 15 is a side elevation view of a therapy device 304
illustrating additional details that may be associated with some
embodiments. As shown in FIG. 15, the venting spike 332 may be
coupled to the therapy device 304. In some embodiments, the venting
spike 332 may be positioned on the therapy device 304 so that if
the cartridge 314 is engaged with the therapy device 304, the
venting spike 332 may engage the port 328. The therapy device 304
may also include a striker 370. The therapy device 304 may also
include a recessed portion 372 surrounding the striker 370. In some
embodiments, the recessed portion 372 may be configured to receive
at least a portion of the latch 336, so that the latch 336 and the
striker 370 may engage one another if the cartridge 314 is engaged
with the therapy device 304.
[0108] The therapy device 304 may also include a pump head 374
having one or more lobes 376. The pump head 374 may be similar to
and operate as described above with respect to the pump head 128,
and the pump head 236. Similarly, the lobes 376 may be similar to
and operate as described above with respect to the rollers 129 and
the lobes 238. In some embodiments, the pump head 374 may be
positioned on the therapy device 304 so that the pump head 374 may
engage the tube 344 if the cartridge 314 is engaged to the therapy
device 304. The therapy device 304 may also include a pressure
sensor 378. The pressure sensor 378 may be a sensor configured to
engage the pressure diaphragm 354 to determine a pressure in the
second mount 342. In some embodiments, the therapy device 304 may
include a sensor 380 and a sensor 382. The sensor 380 and the
sensor 382 may be positioned on the therapy device 304 to
communicate with optional sensors that may be included on the
cartridge 314 .
[0109] FIG. 16 is an exploded view of a lid 418 illustrating
details that may be associated with some embodiments of the
cartridge 314 of FIG. 11. The lid 418 is similar to the lid 318 and
may include the components thereof, modified as described below.
The lid 418 may include a port 428 similar to the port 328. The
port 428 may operate in a manner similar to the port 328. In some
embodiments, the port 428 may be configured to receive the venting
spike 332 as described above.
[0110] The lid 418 may also have a tube assembly 438. The tube
assembly 438 may include a tube 450 and a plurality of couplings
440. The tube 450 may have a first end configured to pass through
an aperture 452 formed in the lid 418. In some embodiments, the
aperture 452 may be positioned on an end of the lid 418 proximate
to the port 428. In some embodiments, the aperture 452 may be
disposed in a recessed portion of the end of the lid 418. In some
embodiments, the aperture 452 may be sized to accommodate the tube
450 while providing a seal to the tube 450. In some embodiments,
the tube 450 may be in fluid communication with the fluid reservoir
320 through the aperture 452 in the lid 418. The tube 450 may
include a segment (not shown) that extends from the aperture 452 to
an end of the lid 418 that is opposite the aperture 452 so that an
end of the tube 450 may be located proximate to a bottom of the
fluid reservoir 320. The tube 450 may be have a lining of
polyethylene. Lining the tube 450 with polyethylene may reduce
reactions with fluid stored in the fluid reservoir 320. In some
embodiments, additional tubes may be lined with polyethylene.
[0111] The tube assembly 438 may also include a tube 444, an
ultra-sonic inspection segment 446, a load cell segment 448, and a
tube 454. In some embodiments, the tube 450 is fluidly coupled to
the load cell segment 448 with a coupling 440 so that fluid in the
tube 450 may flow into the load cell segment 448. A load cell, such
as the load cell segment 448, may be a transducer that converts a
force into an electrical signal. A force applied through a load
cell may deform a strain gauge, changing the electrical resistance
of the strain gauge which may be interpreted by a controller or
other device as an amount of force applied. In some embodiments,
the load cell segment 448 may be configured to communicate with a
corresponding sensor on a therapy device. For example, in some
embodiments, the load cell segment 448 may communicate with the
sensor 380 or the sensor 382 of the therapy device 304. In some
embodiments, the load cell segment 448 may be configured to
communicate with the sensor 380 if the cartridge 314, having the
lid 418, is engaged with the therapy device 304. If fluid flows
through the load cell segment 448, the fluid may exert a force on
the load cell segment 448 that may generate a corresponding signal
in the sensor 380. In this manner, the therapy device 304 may
determine if there is fluid in the fluid reservoir 320. In some
embodiments, the load cell segment 448 may also detect occlusion
situations (blockages).
[0112] The load cell segment 448 may be fluidly coupled to the tube
444 through another coupling 440. In some embodiments, the coupling
440 may be an elbow coupling, such as the coupling 440 between the
load cell segment 448 and the tube 444. The tube 444 may be fluidly
coupled to the ultra-sonic inspection segment 446 with yet another
coupling 440. The tube 444 may be positioned to form an arc so that
the tube 444 may receive a pump head, such as the pump head 374 of
the therapy device 304. If actuated by a therapy device 304, the
pump head 374 may engage in peristalsis to move fluid from the
fluid reservoir 320 through the tube 444 for fluid communication
with a tissue site as described above.
[0113] In some embodiments, the ultra-sonic inspection segment 446
may be a device configured to use ultrasound to monitor the fluid
reservoir 320. The ultra-sonic inspection segment 446 may be
configured to communicate with a therapy device, such as the
therapy device 304. For example, if the cartridge 314 having the
lid 418 is engaged with the therapy device 304, the ultra-sonic
inspection segment 446 may be in communication with the sensor 382.
The ultra-sonic inspection segment 446 may also detect occlusion
situations (blockages).
[0114] The ultra-sonic inspection segment 446 may be fluidly
coupled to another tube 454 with another coupling 440. The tube 454
may have a coupling on an end of the tube 454 opposite the
ultra-sonic inspection segment 446. In this manner, the tube 454
may be used to fluidly couple the cartridge 314 having the lid 418
to a dressing and a tissue site.
[0115] The lid 418 includes a recess 456 molded into the lid 418.
The recess 456 may be shaped to accommodate the connection of the
tube assembly 438 so that the tube assembly 438 is flush with, or
at least partially recessed from an exterior surface of the lid
418. A portion of recess 456 may be sized to receive a pump head,
such as the pump head 374 of the therapy device 304 so that the
exterior surface of the lid 418 is flush with the therapy device if
the cartridge 314 is engaged with the therapy device 304.
[0116] FIG. 17 is an elevation of another example embodiment of a
cartridge 514 that may be used with a therapy device, such as the
therapy device 104, the therapy device 204, or the therapy device
304, modified as described below. The cartridge 514 may be similar
in many respects to the cartridge 114, the cartridge 214, and the
cartridge 314. The cartridge 514 may include a shell 516. In some
embodiments, the shell 516 is at least partially ovoid-shaped
having a rounded end and a flattened end opposite the rounded end.
In some embodiments, the rounded end is a lower end configured to
engage a portion of a therapy device to at least partially secure
the cartridge 514 to the therapy device. The shell 516 also may
include notches 521. The notches 521 may be molded recesses formed
in a portion of the shell 516 proximate to the flattened end. The
notches 521 may provide a handle portion configured to allow a
person to grip the cartridge 514 for engagement and disengagement
with a therapy device.
[0117] In some embodiments, the shell 516 may include an aperture
517 through the flattened end of the shell 516. The aperture 517
can provide fluid communication between an exterior of the
cartridge 514 and an interior of the cartridge 514. The cartridge
514 may also include a port 522. In some illustrative embodiments,
a filter may be disposed in the port 522 to prevent bacteria,
viruses, and other undesirable materials from entering the
cartridge 514.
[0118] In some embodiments, the cartridge 514 also has a tube
assembly 538, which may be similar to the tube assembly 338 or the
tube assembly 438. The tube assembly 538 may include suitable
connectors, such as an elbow 540, and a tube 544. In some
embodiments, the tube assembly 538 may be fluidly coupled to a
conduit 508, which may be adapted for coupling to a dressing. As
illustrated, the tube 544 may extend across a raceway 546. The tube
assembly 538 is configured to engage a pump head of a therapy
device, so that the pump head may cause instillation solution
disposed within the cartridge 514 to flow through the tube assembly
538 and the conduit 508 to a tissue site as described above.
[0119] FIG. 18 is an elevation of a second side of the cartridge
514 illustrating additional details that may be associated with
some embodiments. In some embodiments, the raceway 546 may be a
cavity in the shell 516 adapted to receive a circumferential edge
of a rotary-delivery pump head (not shown). In some embodiments,
the raceway 546 may be a portion of a mount 545. The mount 545 may
be a device coupled to the shell 516 and configured to position the
tube assembly 538 to receive a pump head. The mount 545 may also
include a latch 506. The latch 506 may be positioned adjacent to
the flattened end of the shell 516. The latch 506 may be configured
to engage a portion of a therapy device to secure the cartridge 514
to the therapy device.
[0120] FIG. 19 is a cross-sectional view of the cartridge 514
illustrating additional details that may be associated with some
embodiments. The shell 516 may form a fluid reservoir 520, similar
to the fluid reservoir of the cartridge 114, the fluid container
215, and the fluid reservoir 320. In some embodiments, the shell
516 may include mounting locations 523 configured to receive
fasteners 527 to secure the shell 516 to the mount 545. The
fasteners 527 may seal to the shell 516 to prevent leakage of fluid
through the mounting locations 523.
[0121] The cartridge 514 may be positioned to engage with and
interact with a pump head. The raceway 546 may be a semicircular
cavity, and tube 544 may be suspended across the cavity. In more
particular embodiments, the raceway 546 may be a cavity with an arc
of about 180 degrees. For example, the tube 544 and the raceway 546
may be aligned with and disposed on a circumferential edge of a
rotary-delivery pump head. Thus, the tube 544 is disposed between
raceway 546 and the edge of a pump head. The tube 544 may be
stretched and pressed into and against raceway 546 by a pump
head.
[0122] In some embodiments, the latch 506 may be a spring loaded
mechanism configured to engage a mating component of a therapy
device. In some embodiments, the latch 506 may include buttoning
mechanisms, threaded mechanisms, clip mechanisms, or friction
engagement mechanisms, for example. In some embodiments, the latch
506 may be disposed on the cartridge 514 and engage a mating
element, such as a notch, clip, or threaded coupler, for example,
on a therapy device.
[0123] FIG. 20 is a side elevation of a therapy device 504
illustrating details that may be associated with some embodiments.
FIG. 21 is a partial front elevation of the therapy device 504
illustrating additional details that may be associated with some
embodiments. The therapy device 504 may be similar to the therapy
device 104, the therapy device 204, and the therapy device 304,
modified as described herein. The therapy device 504 may have outer
dimensions similar to the outer dimensions of the cartridge 514
proximate to the mount 545. In some embodiments, if the cartridge
514 is engaged with the therapy device 504, the edges of the
therapy device 504 may be flush with the edges of the cartridge
514. In some embodiments, the therapy device 504 may include a
recess 505. The recess 505 may have a shape configured to receive
the mount 545. In some embodiments, the recess 505 may include a
counterpart to the latch 506 proximate to a flattened end of the
therapy device 504 that is configured to engage the latch 506.
[0124] In some embodiments, the therapy device 504 may also include
a pump head 507 having one or more lobes 509. The pump head 507 may
be similar to the pump head 128, the pump head 236, and the pump
head 374. In some embodiments, the pump head 507 may be oriented
perpendicular to a plane containing a side surface of the therapy
device 504. In this manner, the pump head 507 may protrude from the
recess 505 of the therapy device 504.
[0125] In operation, the therapy device 504 may rotate the pump
head 507, and the lobes 509 attached to the external circumference
of the pump head 507 may cyclically engage and compress the tube
544. As the pump head 507 turns, the part of the tube 544 under
compression is occluded, which can force fluid through the tube
544. Additionally, as the tube 544 opens after a lobe 509 passes,
fluid may be drawn into the tube 544 from the fluid reservoir 520
through the port 522 and elbow 540. Thus, in the illustrative
embodiment of FIGS. 17-21, fluid may be cyclically drawn in from a
bottom portion of the fluid reservoir 520 and pumped upwards
through tube assembly 538 to conduit 508.
[0126] The systems and methods described herein may provide
significant advantages, some of which have already been mentioned.
For example, the therapy system 100 minimizes usability problems in
clinical care settings by replacing hanging irrigation bags and
bottles on intravenous poles. The system provides the instillation
solution via a solution cartridge that minimizes intravenous bags
and the confusion associated with the device placement and setup of
the same. Still further the system can decrease the amount of time
required to setup and change canisters. The system can also provide
volumetric delivery of instillation solution (via a solution
cartridge) with a negative wound pressure therapy device.
Specifically, the system allows for a rotary-delivery pump (located
on the device) to engage a disposable cartridge that contains an
instillation solution.
[0127] Although certain illustrative, non-limiting embodiments have
been presented, it should be understood that various changes,
substitutions, permutations, and alterations can be made without
departing from the scope the appended claims. It will be
appreciated that any feature that is described in connection to any
one embodiment may also be applicable to any other embodiment.
[0128] It will be understood that the benefits and advantages
described above may relate to one embodiment or may relate to
several embodiments. It will further be understood that reference
to "an" item refers to one or more of those items.
[0129] The steps of the methods described herein may be carried out
in any suitable order, or simultaneously where appropriate.
[0130] Where appropriate, features of any of the embodiments
described above may be combined with features of any of the other
embodiments described to form further examples having comparable or
different properties and addressing the same or different
problems.
[0131] It will be understood that the above description of
preferred embodiments is given by way of example only and that
various modifications may be made by those skilled in the art. The
above specification, examples and data provide a complete
description of the structure and use of exemplary embodiments of
the invention. Although various embodiments of the invention have
been described above with a certain degree of particularity, or
with reference to one or more individual embodiments, those skilled
in the art could make numerous alterations to the disclosed
embodiments without departing from the scope of the claims.
* * * * *